mineral

Polished jasper pebble

Jasper, an opaque microcrystalline variety of quartz (SiO₂), often chalcedony with iron-oxide inclusions

AI-generated identification · may be incorrect

Mohs hardness 6.5–7; opaque, mottled yellow, ochre, brown, and gray with a waxy to vitreous polish. Its microscopic quartz crystals are too small to see; no distinct cleavage, conchoidal to uneven fracture, specific gravity about 2.6.

Identified October 4, 2026More mineral →

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Physical properties

Formation & geological history

Silica-rich fluids deposited and hardened in volcanic or sedimentary settings, with iron oxides producing the colors. The image cannot establish a particular geological age or locality.

Uses & applications

Commonly cut and polished for cabochons, beads, ornaments, and small collectibles; jasper is also used decoratively.

Geological facts

Jasper is a trade name for patterned, opaque chalcedony rather than one precisely defined mineral species.

Field identification & locations

The polished surface and opaque, irregularly mottled color fit jasper, but exact identification and variety are not certain from the photo. Similar material occurs worldwide; collector value depends on pattern, workmanship, and size.